Variable-speed mechanism.



J. BECKER.

VARIABLE SPEED MBCHANISM.

APPLICATION FILED AUG. 22. 1912.

Patented N0v.3, 1914.

min/ease@ I nvewor: M/ a?) John/B ecker. .il s

THE NORRIS PETERS 60,. PHOm-LITH W., WAS" J. BECKER.

VARIABLE SPEED MEGHANISM.

APPLIOATIGN FILED AUG. 22, 1912.

1,115,487. Patented 110111914.

3 SHEETS-SHEET 2.

THE NORRIS PETERS CO.. PHOTO-LITHO.. WASHINGTONv `D. C.

J. BEGKBR.

VARIABLE SPEED MBGHANISM.

APPLICATION FILED AUG. 22, 1912.

Patented Nov. 3, 1914.

a SHEETS-SHEET s.

an Tan siiiriismnivr orFiC-f JOHN BECKER, or HYDEPARK, MASSACHUSETTS.

VARIABLE-SPEED MECHANISM.

To all whom t may concern t Be it known that I, JOHN BECKER, a citizen of the vUnited States, and a resident of Hyde Fark, in the county of Norfolk and Commonwealth of Massachusetts, have invented an improvement in Variable-Speed Mechanism, of whichl the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to improvements in variable speed gears of the general character disclosed in LettersPatent No. 1,0503 92, granted to me on January 21, 1913.

Among other objects, the invention provides means for readily shifting the gears and securely holdingy them in various positions of adjustmen. y

Y The character of the inveiitioiimay be best understood by reference to the following description of an' illustrative embodiment thereof sho-wn in the accompanying drawing, wherein;

Figure 1 is a vertical sectionythrougli an illustrative variable speed mechanism embodying the invention; Fig. 2 yis ja view 4partly, in elevation and partly in section taken on line 2-2 ofFig. 1; Fig. 3' is a view partly in elevation and partly in sec-` tion taken on line 3-3 of Fig. 1; and Fig. 4 is a detail'to be referred to. ,n

Referring to the drawings, the tive mechanism there shown as embodying the invention comprises acasing 1 having bosses 3 'forming bearings i, for al driving shaft l5 (Fig. 1),',a driven shaft Z andan intermediate shaft 9.- "The driving shaft has a wide pinion 11' (Fig. 3) fast thereon; they driven shaft has a larger wide pinion 12 Fig. 2) fast thereon, andthe intermediate sha-ft has differentisizedvgears 13a, 13", 13 fast thereon. lWhile three intermediate gears are shown herein for illustrative purposes, any numbervmay be used as desired. To transmit rotation from one of said wide pinions to the intermediate gears, and from ther latter to the other wider pinion, tumblerV gearsl are provided fast on shafts 17 journaled in boss bearings-19 in -pairs of rocky carriers'21 exterior of the casing and terminating in fulcra rings 23 encircling the boss bearings of the driving and driven shafts 5 and 7. The carriers of each pairl are connected kto move together by a pin 21a fast in ears in the upper ends of said-car-` riers, said `pin being provided with a handle illustra- Specication of Letters Patent. p lpatelltd' NOV. 3, 1914. Application ledAugust 22, 1912. Serial No. 716,380. j v K l 2lb fast thereon for a" purpose to be de' scribed;l To changethevr speed it is necessary t0 shift the tumbler gearsfaxially `and also14 toward or from the iiitermediategears." ."To shift the tumbler gears 'axially,; each is mounted fasten itsshaft and oneof its boss bearings is yof suflicient length to receive a bearing sleeve 25 (Fig. 3).,mov'ed longitudinally with said shaft by a pin '27 projecty ing internally from said sleeve into an anv nular groove 29 in said shaft. 'To slide the shaft and sleeve the latter has a rack 31 slid longitudinally by: a pinion 33 (Fig. 4) hav y i ing a smooth extension. 35 journaled in a this dowel pin normally in its socketthere` is "provided a helical springl 45 encircling said stem and confined between a head 47 on `said `stem andthe end vof'acounter-bore in ysaid handle. To limit axial movement of the rack actuating pinion under the action of this spring, its smooth extension terminates vin a head 49 engaging the end of the sleeve By the above de scribed construction, to shift the tumbler `gear "axially it is merely necessary, first,y to

opposite, vsaid handle.

pull -tlievhan'dle 41 axially until the lock dowel pin 43 is released from its socket, andy then turn the handle vto rotate thepinion sufliciently toslide its rackand the shaft 17 to bringthe .tumblery gear .opposite the de,-

sired intermediate gear.v ln the illustrative device. shown herein, one complete [turn of -the handle will move thev tumbler gearr out of line with one gear into line with the next adjacent gear. On the. completion ofv this turn the locking 4dowel pin will return into registrationwithjitssocket, and on release y of the handle, the spriiig4v7'will set said pin in its socket and securely: lock the pinion and the r,tumbler gear against inadvertent axial movement.

Having described the means for adjusting the tumbler (gears axially, I will next 'def scribe 'the meansfor securingfthe rock car'- riers 21, 4referred to, at various distances from the intermediate shaftin order to hold boss 37 vtransverse to the elongated bossi;l

V the tumbler gears into mesh with any one .of thel different sized gears.k l/Vhen a tuniy positions near the Walls of the casing, therei is more Work brought to bear upon one of the boss bearings of the tumbler shaft than on the other and hence a tendency for the shaft to be thrown out of true alinement. lf, however, the carrier is locked adjacent the eXtreme limits of adjustment of the tumbler gear axially of its shaft, any rocking of one of thev tumblershaft carriers more than the other is prevented and said shaft is alivays held parallel to the intermediate gear shaft. To this end the top. of the casing is provided4 With spaced ribs 55 (Fig. 3) each provided With a series of stops or notches 5T (Fig. l) corresponding.` to the different positions of adjustment of the tumbler gears.

ln the illustrative. device. three different sized gears are shown and. accordingly each of said ribs is providedvr withl three notches. Cooperating' With these notches is. a blade or member y59 of sufficient length for one of its. ends to engagea notch in one of the ribs While its opposite end engages. a correspond ing notch in the opposite rib, as. shown in Figs. Q, and "llhe bladeiis. set in a recess 46l in a rock arm 63 having forkedends terminating in bossesl G5 journaled on the pin 2l2L referred to, and straddling the carrier operating handle 2lb. 'lo control this rock arm it is provided with a handle 6? preferably integral therewith and projecting upA Wardly along thekcarrier handle-in position to. permit the two to be simultaneously grasped to roch the blade 59 into and out of the rib notches 57.

To prevent the blade from accidentally Working up out of its notches under the jarring and vibration which of necessity occurs in mechanisms of the character describedherein, the thrust receiving Walls of the notches are curved or concaved to provide seats 57a, the curve of each of which is on an arc struck about the axis of the handle pin Zlaas a center and an edge of the blade is curved to correspond with the curvature of these seats. As a. result the blade may accurately seat in said seats and may be rocked in and out of the same Without undue Wear or mutilation therof.

To take yup any Wear or back lash between the gears and enable the most vperfect meshlng thereof, provision is made for varying the different positions of adjust-ment of the carrier. .To this end set screws 69 (Fig. 1)'- of adjustment in its recess it is provided with elongated slots [71 receiving clamp screws T3 entered through a v1cvall 7 5 of the recess, the latter having -suiiicient spring under the action of the clamp screws to securely grip the blade and hold the same in place.

it vWill be observed that the point of engagement of the blade 59 with its seats is Abetween -rierr pinl 21a and the fulcrum of the carrier on the casing.

the fulcrum of its arm on the car- The carrier, in holding the tumbler gear up toits intermediate gear,

'tends to react and rock axvaytherefrom. As

a result the blade arm is rocked and presses land maintains the blade-down into the notch single tumbler' gear may be used on one side of vsaid gears ify desired.

Having described one embodiment of the `ini-*ention Without. limiting the same thereto, what I claim as nevx7 and desire to secure by Letters Patent is:

l; In a variable speed mechanism,l the combination of' different sized gears, a shaft, a tumbler gear fast thereon, rack and pinion means for shifting the latter axially, and a spring pressed handle connected to said pinion andy having provision permitting the same tobe rotated after a preliminary axial movement thereof.

Q; ln' a variable speed mechanism, the combination of different sized gears, a tumbler gear, a carrier therefor movable toward and fromsaid different sized gears, a casing having spaced rows of notches thereon, and an elongatedfblade for Simultaneous engagement With `pairs `of said notches to resist movement of said tumbler gear out of true alining mesh with said different sized gears.

3.111 a variable speed mechanism, the combination of different sized gears, a tumbler a shaft therefor, a carrier `for said shaftmovable ton/'ard orl from said different .sized gears,`fiXed means and carrier locking means for application to said fixed means at spaced points along the same in the direction Y of the length of said shaft for resisting movement of said shaft out 'of true alinement.

l. In a variable speed mechanism, the combination of diderent sized gear, a tum -bler gear, a shaft therefor, a carrier for ling ends projecting beyondsaid casing,4 a

carrier fulcrumed on .the latter and having y positionsof adjustment relative'y to said'in-v ing said gear in different positions ofradjustment including an elongated/blade, and means engaging the same at different points to prevent movement of said shaft out of true alinement.

combination of a casing, different sized gears, a tumbler gear, a shaft for'the latter, al carrier for said shafti'fulcrum'ed onsaid casing and adjustable toward and from said Vdifferent sized gears, and means to secure said carrierin different positions of adjustnient including spaced notched ribs on said casing and a blade on said carrier for engagement .with notches in both of said `ribs to resist ino-vementofsa'id shaft-outof alinement. .f 6. In a variable speed mechanism, the combination of a casing, different sized gears, a tumbler gear, ashaftptherefor` havbearings receiving saidshaft and means o af u n@ n j positethe outer intermediate gears for locking said carrier to said .casing in different termediate gears. v w

7. 'In a variable speed mechanism, the

combination ofk different sized gears, a itum-y j blerI gear a shaft therefor, a carrier for said shaft adjustable toward and fromsaid in-` termediate gears, and means for locking said carrier in different positions o f adjustmentl comprising a long. blade fulcrumed to said carrier and stop means engaged by vthe ends of said blade. y .,z j 8. In a variable/speed vrmechanism, the

combination of different sized gears, a tumyv bler gear movable toward and f romf the same, a shafty for said tumbler gear, a carrier for said shaft, a locking` blade fulcrumed to said carrier, vand means having curved seats engaged-by a correspondinglyl curved edge of sa-id: blade for preventing accidental displacement of said blade.

9. In a variable Vspeed mechanism, y the combination of dierent sized gears, a tumbler gear and its shaft, a rockingcarrier for the latter and mea-ns vfor locking the same in different positions'of adjustment comprising means fulcrumed on said carrier, `and fixed means engaged thereby, said fulcruined means having provision for engagementwith said fixed means at a point between its connection with saidcarrier and the fulcrum of said carrier, said point being on the side of the latter opposite from said dif ferent sized gears whereby said fulcrumed means automatically is seated against said fixed lmeans in resisting movement of the tumbler gear from said different. sized gears.

10. In a variable speed mechanism, the

L .said different sized gears.`

combination of ydifferent sized gears,l a tumrier in different` positionsk of." adjustment comprising a stop, `and yrocking means fulf crumed on said carrier for engagement with; lsaidjstopl at, a point between the fulcra of 5. In ka variable speed mechanism, the

said carrier and rocking means.

combination cfa plurality of different' sized gears, atumbler gear and its shaft, a carrier forosai'd shaftpand means `.for holding said carrier 'iny different positions of adjustment relatively to saidfdilferent sized gears and including a plurality of stops, and means on said carrier for j engagement with said stops and having a pivotedy connection to said ll-rIn a` variable speed vmechanism, they 4, l

carrier `with .provision .for automatically" urging said stop engaging means against .one or Janother '0f said stopsin resistingL the driving thrust between`saidtumblerl gear and different sized gears.L

.carrier in different'positions of adjustment includinga-'plurality of stops, and rocking ymeans fulcruined. on said carrier'and having provisionfor engagement with any of said y stops at apoint intermediatethe fulcra; of,y ysaid yrocking means and ,'carrie`r,` said point being on] the side of the latter opposite from .y

13. In a variable speed mechanism, the

combination of different sized gears, a tum-y Q bler` gear, -a rocking carrier therefor and means for holding the latter in'k diHerent-i positions of adjustment including stops, yand means carried by said carrierfor engagesaid point being on the vside of the latter. opposite from the diiferent sized gears.

a 14h-Ina variable speed mechanism, the combination of different sized gears, atum bler gear and its shaft, a rocking carriery therefor adjustable'fjtoivardand from said differentgsized/gears, and means for locking saidcarriervinits different positions ofk adjustmentcomprising'a stop, a rockfarm fulcrum'ed to said carrier and a blade' carried bys'aid armwa'iid engagingv saidstopat a pointfintermediate the yfiilcra of said rock arm and carrier,k i l Y 15. In a variable ,speedy mechanism, the combinationy ofA a casing, different sized gears, a tumbler gear anditsshaft, a carf rier for said tumbler gear-adjustableto- `'ward and from said different sized -gears, said casing having spaced ribs provided with curved lock seats, and an arm fulcrumed to said carrier and havin conform' to Said seats.

g means Curved to iso ini-o5 ment with one or `another of said. stops 4vata point-between its point of connection with said carrier `and the fulcrum of said carrier, e

17.. In a variable speed'. mechanism, the. combination of: a. casing, different sized gears, atumbler'gear anditsshaft, a earriei'r for said shaft adjustable.relativelyto; saijd inten-mediate gears, and' means.l for securing said carrier in different positions of adjust- `ment` comprisingnotched ribs, a. rock arin fulcruniedi to.A saidp carrier' and having a blade .for engagement. with` thenotche's of said ribs andi a' spring pressent handle fon said blade.

18. In a variable speed mechanism, the combination ofi a casing,n differenti sized gears, a tumbler gear' and its shaft, a car`- rie-r, ahandle for sWingingFthe latter toward and from said intermediate gears, and means forloching said cari-'ierin different. positions of' adjustment comprising stops on said casing determiningl said positions, meansscarrying a blade for engagement with said stops and a handle f for controlling saidv blade carrying means. y

19. In a variable speed` mechanism, the

combination of" diferent sized gears, a

tumbler gear, a shaft, acarrier having Widely spaced bearings receiving said shaft, aiid means for locking saidca-rrier atfwidelyspaced pointsin diierent'positioiis-'of ad'- justmeiit relatively to said different sized gears.A j

20'. In a variable speed mechanism', the combination of different sizedy gears,y atiinibler gear and its shaft, a7 carrier ad'- justable toward and Vfrom said different sized gea-rs, andmeans-for loclringsa-id carrier iii itsdifferent-Y positions ofadjustinent including means for varying the -meshiiig engagement ofthe gears.

Q1. In a variable` speed mechaiiisiiif, the

combination of' different sized" gears', a tumbler gear and its shaft, a carrier adjust ablertowardl and from said-z different sizedgears, and meains 'for locking. said carrierin itsldiiferent. positions of adjustment conip'rising: ned: means: having stops correspondiiiigtorthe dierent positions of adjustyment of said: carrier, andy means for'adjusir ingy said carrier relatively to said stops. j' 22. In as variable: speed mechanism, the combination. of diiferenta sized gears, a

tiimbler.'.geaiffandaits shaft,.^a carrier there,- *forf adjustable toward. and from said different sized. gears,`and; means for locking said carrier in; itsv different positions of adjustment' and: having provisionv for varying: said lpositions to permit tlie adjustment of the gears into proper meshing; relation.

In. ai variable,speed` mechanism, the combination of 'different sized gears, a

tumbler gear and its shaft, a carrier there`-` for adjustabletoWard-i andfrom said diHerent" sizedl. gears, and means for locking said carrier initsdifferent positions of adjustment comprising; a rock armA fulcrumed to said' carrier, and a. blade adjustablev relatively' to saidl rock arm.

24...I1n a` variable. speed4 mechanism, the

combination 'of' different sizedl gears, a` 'tumbler gearland'its shaft', a carrier adjustable toward and from said diferentsized gears, and means for locking said carrier in itsdifferent' positions of adjustment comprising afy rock arm, a blade adjustably mounted iii.- said. arm,'nieans to secure said blade in itspositionsl of'adjustmeiit in said arm' and stops engaged by said blade.

In a.' variable speed' mechanism, the combinationv of differenti sized gears, a shaft, a tumbler gear fast thereon, acarrier for said shaf-tl adjustablev toward orv from saidy different. sized gears, a non-rotatable sleeveniovable axially With" said shaft, a

rack' ori-said.y sleeve, a pinion meshing With said raclnmeans for turning said pinion, and' means for "locking, the latter against ro tation;

In testimonywhereof., I have signed my naine to this specification, inthe presence of two subscribing Witnesses.-

JOHN BECKER.

Witnesses ARTHUR E. CARSON, Evnnn'i'i S; EMERY.

Copiesrefthis patentmayafbe obtained for 've centsfeacli,fbyfaddressing-jthe Commissioner of yEatents,

Washngtoml). Cl 

